Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
The Iga and Kōga have developed independently in a war-torn world. Throughout their long history, both ninja forces had been hostile to each other, but in the 9th year of the Tensho Iga War by Oda Nobunaga, Iga was destroyed. The surviving Shinobu Iga and others were captured by Kōga. Seventeen years later, the Warring States Period was over, and peace in Hisakata had come to the world.
Kai (the main character), a daughter of Kando UENO, the head of Kōga, dreamed of the day when she would go to work secretly, and kept training every day.
Finally, on her first assignment, a big incident occurs that will upset the fate of the main character and Sato.